US6263939B1ExpiredUtility

Optical information medium, and method and apparatus for fabricating the same

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Assignee: MATSUSHITA ELECTRIC INDUSTRIAL CO LTDPriority: Feb 15, 1995Filed: Aug 4, 1999Granted: Jul 24, 2001
Est. expiryFeb 15, 2015(expired)· nominal 20-yr term from priority
Inventors:Hisaki MiyamotoMichiyoshi NagashimaKiyoshi InoueSakae Noda
B29C 65/1406B29C 65/1448Y10S430/146B29K 2995/0027G11B 7/24B29C 65/1435Y10T428/31515Y10S430/118B32B 37/1284Y10T156/1702B29C 66/322B29C 2045/2659B29C 66/71B29C 65/1467B29C 65/4845B29C 65/4815B32B 2310/0831B29C 65/1483Y10T428/25B29C 65/521B29C 66/81267B29C 65/542B29C 66/72321Y10T428/31B29C 66/65Y10T428/24479G11B 7/26Y10T428/21B29C 65/1445B29C 66/452B29C 45/263B32B 2429/02B29C 67/0044B29C 66/8322B29C 66/1122B29L 2017/005B29C 65/7811B29C 65/544G11B 7/007
46
PatentIndex Score
8
Cited by
18
References
9
Claims

Abstract

The disk-shaped optical information medium of this invention includes: a first substrate having a center hole; a second substrate having a center hole; and a radiation curable resin interposed between the first and second substrates for bonding together the first and second substrates, wherein the optical information medium further includes a stopper for preventing the radiation curable resin from protruding into the center holes of the substrates, and a space between the first and second substrates of at least a half of a clamp region for clamping the optical information medium is filled with the resin.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
       1. An apparatus for fabricating an optical information medium by bonding together a first substrate having a center hole and a second substrate having a center hole with a radiation curable resin interposed therebetween, comprising: 
       a table for integrally rotating the first and second substrates, with the radiation curable resin interposed therebetween, before the radiation curable resin is cured; and  
       centrally disposed means for absorbing through the center holes of the first and second substrates the radiation curable resin interposed between the first and second substrates.  
     
     
       2. An apparatus according to claim  1 , wherein an outer diameter of the table is less than an outer diameter of each of the first and second substrates. 
     
     
       3. An apparatus according to claim  2 , wherein the outer diameter of the table is about 70% or more than the outer diameter of each of the first and second substrates. 
     
     
       4. An apparatus according to claim  1 , wherein the means for absorbing the radiation curable resin is at least one suction port. 
     
     
       5. An apparatus according to claim  1 , wherein the means for absorbing the radiation curable resin is a plurality of suction ports. 
     
     
       6. An apparatus according to claim  1 , wherein the means for absorbing the radiation curable resin comprises a suction pump. 
     
     
       7. An apparatus according to claim  1 , wherein the means for absorbing the radiation curable resin comprises at least one suction port in a boss. 
     
     
       8. An apparatus according to claim  1 , wherein the means for absorbing the radiation curable resin is a sponge. 
     
     
       9. An apparatus according to claim  1 , wherein the resin which is absorbed is excess resin.

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